Y-coupled GaAs quantum cascade lasers

A monolithic coupling scheme with two active waveguides merging into a single waveguide is presented for a mid-infrared GaAs/AlGaAs quantum cascade laser. The rapid development of unipolar quantum cascade lasers (QCLs) creates a basis for a broad variety of technological applications. Farfield patte...

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Bibliographic Details
Published in2007 International Semiconductor Device Research Symposium pp. 1 - 2
Main Authors Strasser, G., Hoffmann, L.K., Hurni, C.A., Mujagic, E., Nobile, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2007
Subjects
Frequency
Gallium arsenide
Laser modes
Merging
Optical resonators
Optical signal processing
Optical waveguides
Power lasers
Quantum cascade lasers
Waveguide lasers
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Summary:A monolithic coupling scheme with two active waveguides merging into a single waveguide is presented for a mid-infrared GaAs/AlGaAs quantum cascade laser. The rapid development of unipolar quantum cascade lasers (QCLs) creates a basis for a broad variety of technological applications. Farfield patterns of the identical laser with a truncated mixing region result in a different superposition of the two modes with even and odd symmetry. In conclusion, the fraction of the even mode increases with increasing coupling length. The obtained results allow for designing coherent QCL Y-junctions, which open new possibilities for monolithic interferometric sensing devices.
ISBN:9781424418916
1424418917
DOI:10.1109/ISDRS.2007.4422549